業務部：
掌管所有的空調及相關業務，首先要做好勘測及評估，並與業主取得進一步的討論，收集所有的資料，做出初步的規劃及與業主進一步的互動。

Business department:
To contact and collect all the business, make general servey, discuss with the customer, collect all the information as much as possible, make priminary design, and keep contact with the customer.